<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form method="post" action="/login">
        账号：<input type="text" name="username"><br>
        密码：<input type="password" name="username"><br>
        <div style="display: inline-block">
            <input type="text" name="code"  required placeholder="验证码" />
            <img alt="验证码" onclick="this.src='/kaptcha.jpg'" src="/kaptcha.jpg" />
            <a>看不清？点击图片刷新一下</a>
        </div><br>
        <input type="submit" name="submit" value="登录">
    </form>
</body>
</html>